Display panel and display device

ABSTRACT

Provided are a display panel and a display device. An array layer is located on a substrate. A display layer is located on a side of the array layer facing away from the substrate and includes light-emitting elements. A color filter layer is located on a side of the display layer facing away from the array layer. The color filter layer includes a light-blocking layer and color filters. The light-blocking layer includes first light-blocking portions. Each first light-blocking portion forms an imaging aperture. A protective layer is located on the color filter layer. Each first metal part overlaps the first light-blocking portion. The optical sensor layer is located on a side of the color filter layer facing away from the protective layer and configured to detect an image formed by the imaging aperture. Further provided is a display device including the preceding display panel.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to a Chinese patent application No.CN202010142721.1, entitled “Display Panel And Display Device” and filedon Mar. 4, 2020, the content of which is incorporated herein byreference in its entirety.

TECHNICAL FIELD

The present disclosure relates to the field of display technology, andin particular, to a display panel and a display device.

BACKGROUND

Everyone is characterized with fingerprints. With the development ofscience and technology, various display devices with fingerprintrecognition functions, such as mobile phones, tablet computers and smartwearable devices, have appeared on the market. Before a user operates adisplay device with the fingerprint recognition function, the user canperform permission verification by simply touching the display devicewith a finger, so that the permission verification process issimplified. Moreover, with the gradual increase of the applicationscenarios of the fingerprint recognition function, the fingerprintrecognition region gradually evolves from a partial region to a fullscreen.

In the related display device which is based on optical fingerprintrecognition technology, an optical sensor is often formed on asemiconductor device in the display device. Fingerprint detection isimplemented by using a feature that is when certain semiconductor deviceis exposed to light, the device may generate a leakage current.Specifically, after light generated by a fingerprint recognition lightsource is reflected on a surface where a finger touches the displaydevice, the reflected light hits the optical sensor and the opticalsensor detects the light intensity caused by the fluctuations offingerprint valleys and peaks to generate a fingerprint image. However,the accuracy of fingerprint recognition in the related art needs to befurther improved.

Therefore, how to improve the accuracy of fingerprint recognition on adisplay device needs to be solved.

SUMMARY

The present disclosure provides a display panel, including a substratehaving a first surface and a second surface opposing the first surface,an array layer, a display layer, a color filter layer, a protectivelayer, first metal parts and an optical sensor layer. The array layer isdisposed on the first surface of the substrate, and the display layer isdisposed on a side of the array layer facing away from the substrate andincludes light-emitting elements. The color filter layer is disposed ona side of the display layer facing away from the array layer. The colorfilter layer includes a light-blocking layer and color filters. Thecolor filters are in correspondence with the light-emitting elements.The light-blocking layer includes first light-blocking portions, eachforming an imaging aperture. The protective layer is disposed on thecolor filter layer. Each first metal part overlaps a respective firstlight-blocking portion of the light-blocking layer. The optical sensorlayer is disposed on a side of the color filter layer facing away fromthe protective layer and configured to detect an image formed by theimaging aperture. The present disclosure further provides a displaydevice including the display panel.

The benefit of the disclosed display device improves the imaging effectof the imaging aperture, enhances the quality of the imaging picture andincreases the accuracy of the optical recognition.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a top view of a display panel according to an embodiment ofthe present disclosure;

FIG. 2 is a partial cross sectional view taken along A-A′ of FIG. 1;

FIG. 3 is a top view of a color filter layer of a display panelaccording to an embodiment of the present disclosure;

FIG. 4 is a top view of another display panel according to an embodimentof the present disclosure;

FIG. 5 is a partial enlarged view of the display panel of FIG. 4;

FIG. 6 is a cross sectional view taken along B-B′ of the display panelof FIG. 5;

FIG. 7 is another partial enlarged view of the display panel of FIG. 4;

FIG. 8 is another partial cross sectional view taken along A-A′ of FIG.1;

FIGS. 9-12 are cross sectional views of various display panels accordingto embodiments of the present disclosure;

FIG. 13 is a top view of another display panel according to anembodiment of the present disclosure; and

FIG. 14 is a structural diagram of a display device.

DETAILED DESCRIPTION

The present disclosure will be further described in conjunction withdrawings and embodiments.

It should be noted that in the following description, details aredescribed to provide a thorough understanding of the present disclosure.The present disclosure can, however, be implemented in various othermanners than those described herein and those skilled in the art maymake similar generalizations without departing from the meaning of thepresent disclosure. Therefore, the present disclosure is not limited bythe embodiments disclosed below.

The terminology used in embodiments of the present disclosure is fordescribing specific embodiments only and is not intended to limit thepresent disclosure. As used in the present disclosure and the appendedclaims, singular forms “a, an” and “the” are also intended to includeplural forms unless the context clearly indicates other meanings.

It should be noted that directional terms such as “upper”, “lower”,“left” and “right” described in embodiments of the present disclosureare described at the angle shown in the drawings and should not beconstrued as limiting the present disclosure. Further, in the context,it should be understood that when an element is referred to be formed“on” or “under” another element, the element can be formed not onlydirectly “on” or “under” another element, but the element is alsopossible to be formed indirectly “on” or “under” another element throughan intermediate element.

Moreover, example embodiments can be implemented in various manners andshould not be construed as being limited to the embodiments providedherein. Rather, these embodiments are provided so that the presentdisclosure is more thorough and complete and the concept of the exampleembodiments is fully conveyed to those skilled in the art. In thedrawings, the same reference numerals denote the same or similarstructures, and thus a repeated description of the same referencenumerals will be omitted. Words denoting positions and orientationsdescribed in the present disclosure are illustrated by examples ofdrawings, but changes may be made as required, and the changes arecontained within the scope of the present disclosure. The drawings ofthe present disclosure are only used for illustrating relativepositional relationships, the layer thicknesses at certain locationshave been drawn exaggeratedly to facilitate understanding, and the layerthicknesses in the drawings do not represent proportional relationshipsof the actual layer thicknesses. Moreover, if not in conflict,embodiments of the present disclosure and features thereof may becombined with each other. The drawings of embodiments of the presentapplication have the same reference numerals. Further, similaritiesbetween the embodiments are not repeated here.

FIG. 1 is a top view of a display panel according to an embodiment ofthe present disclosure. FIG. 2 is a partial cross sectional view takenalong A-A′ of FIG. 1, and the cross section shows the device in aperpendicular view to the plane where the display panel is located.

In FIG. 1, the display panel 100 is divided into a display region AA anda non-display region NA surrounding the display region AA. It should beunderstood that a dotted box in FIG. 1 is used for illustrating aboundary between the display region AA and the non-display region NA.The display region AA is a region of the display panel for displayingimages. The display region AA typically includes pixel units arranged inan array. Each pixel unit includes a light-emitting element (forexample, a diode) and a control element (for example, a thin-filmtransistor constituting a pixel driving circuit) corresponding to thepixel unit. The non-display region NA surrounds the display region AAand typically includes a peripheral drive element, peripheral wiring anda fan-out region.

The display panel 100 includes a substrate 110. The substrate 110 (thatis, the substrate base) may be flexible and thus extensible,collapsible, bendable or rollable, so that the flexible display panelmay be extensible, collapsible, bendable or rollable. The substrate 110may be formed by any suitable insulating material with flexibility. Thesubstrate 110 is used for blocking oxygen and moisture, preventingdiffusion of moisture or impurities through the flexible substrate, andproviding a flat surface on an upper surface of the flexible substrate.For example, the substrate 110 may be formed by a polymer material suchas polyimide (PI), polycarbonate (PC), polyether sulfone (PES),polyethylene terephthalate (PET), polyethylene naphthalate (PEN),polyarylate (PAR) or glass fiber reinforced plastic (FRP). The substrate110 may be transparent, translucent or opaque. In an embodiment, thedisplay panel may further include a buffer layer (not shown) on thesubstrate 110, and the buffer layer may cover the entire upper surfaceof the substrate 110.

The display panel 100 further includes an array layer 200 located on thesubstrate 110. The array layer 200 is located on a side of the substrate110 facing toward a display surface or touch surface of the displaypanel 100. The array layer 200 may include multiple thin filmtransistors (TFTs) 210 and a pixel circuit constituted by the TFTs. Thepixel circuit is used for controlling light-emitting elements in thedisplay layer.

This embodiment utilizes top-gate thin film transistors as an example toillustrate the structure. A thin film transistor layer 210 includes anactive layer 211 located on the substrate 110. The active layer 211 mayinclude a material such as amorphous silicon, polysilicon or metaloxide. When the active layer 211 is the polysilicon material, it may bemade by the technology of low temperature amorphous silicon, that is,the amorphous silicon material is melted by a laser and deposited toform the polysilicon material. Moreover, various methods such as a rapidthermal annealing (RTA) method, a solid phase crystallization (SPC)method, an excimer-laser annealing (ELA) method, a metal inducedcrystallization (MIC) method, a metal induced lateral crystallization(MILC) method or a sequential lateral solidification (SLS) method may beused. The active layer 211 further includes a source region and a drainregion formed by doping N-type impurity ions or P-type impurity ions,and a channel region formed between the source region and the drainregion.

The display panel 100 further includes a gate insulating layer 212located on the active layer 211. The gate insulating layer 212 includesan inorganic layer such as silicon oxide or silicon nitride, and mayinclude a single layer or multiple layers.

The display panel 100 further includes gates 213 located on the gateinsulating layer 212. The gate 213 may include a single layer ormultiple layers made from metal such as gold (Au), silver (Ag), copper(Cu), nickel (Ni), platinum (Pt), palladium (Pd), aluminum (Al),molybdenum (Mo) or chromium (Cr), or made from alloy such as aluminum(Al): neodymium (Nd) alloy and molybdenum (Mo): tungsten (W) alloy.

The display panel 100 further includes an interlayer insulating layer214 located on the gates 213. The interlayer insulating layer 214 may beformed by an inorganic insulating material such as silicon oxide orsilicon nitride. Of course, in other embodiments of the presentdisclosure, the interlayer insulating layer 214 may be made from anorganic insulating material.

The display panel 100 further includes source electrodes 2151 and drainelectrodes 2152 located on the interlayer insulating layer 214. Thesource electrode 2151 and drain electrode 2152 are electricallyconnected (or bonded) to the source region and the drain regionrespectively through contact holes, and the contact holes are formed byselectively removing the gate insulating layer 212 and the interlayerinsulating layer 214.

The array layer 200 may further include a passivation layer 220. In anembodiment, the passivation layer 220 is located on the sourceelectrodes 2151 and the drain electrodes 2152 of the thin filmtransistors 210. The passivation layer 220 may be made from an inorganicmaterial such as silicon oxide or silicon nitride, or may be made froman organic material.

The display panel 100 may further include a second planarization layer230. In an embodiment, the second planarization layer 230 is located onthe passivation layer 220. The second planarization layer 230 includesan organic material such as acryl, PI, or benzocyclobutene (BCB). Thesecond planarization layer 230 has a planarization function.

The display panel 100 further includes a display layer 300 located on aside of the array layer 200 facing away from the substrate 110. Thedisplay layer 300 includes light-emitting elements. In an embodiment,the display layer 300 is located on the second planarization layer 230.The display layer 300 includes anode layers 310, organic light-emittingmaterials 320, and cathode layers 330 sequentially disposed in adirection facing away from the substrate 110. The display layer 300further includes a pixel definition layer 340 located on a side of theanode layers 310 facing away from the array layer 200. The pixeldefinition layer 340 may be made from an organic material such as PI,polyamide, BCB, acryl resin or phenolic resin, or made from an inorganicmaterial such as SiNx.

In an embodiment, the anode layer 310 includes multiple anode patternsin one-to-one correspondence with the pixels, and the anode pattern inthe anode layer 310 is connected to the source electrode 2151 or thedrain electrode 2152 of the thin film transistor 210 through a via inthe second planarization layer 230. The pixel definition layer 340includes multiple openings exposing the anode layers 310, and the pixeldefinition layer 340 covers the edge of the patterns of the anode layers310. The organic light-emitting material 320 at least partially fillsthe opening of the pixel definition layer 340 and contacts the anodelayer 310.

In FIG. 2, the anode layer 310, the organic light-emitting material 320and the cathode layer 330 defined by each opening of the pixeldefinition layer 340 constitute a light-emitting element 350 (that isshown in a dotted box), each light-emitting element 350 may emit lightof different colors according to different organic light-emittingmaterials 320. Each light-emitting element 350 constitutes a pixel (oreach light-emitting element and a pixel circuit controlling thelight-emitting element jointly constitute a pixel), and multiple pixelsjointly display an image.

The organic light-emitting materials 320 may be formed in the openingsof the pixel definition layer 340 by the way of inkjet printing, nozzleprinting or evaporation. The cathode layer 330 may be formed on the filmof the organic light-emitting material 320 by evaporation. In anembodiment, the cathode layer 330 may also integrally cover the organiclight-emitting material 320 and the pixel definition layer 340.

The display panel 100 further includes an encapsulation layer 400located on the display layer 300 and the encapsulation layer 400integrally covers the display layer 300 to seal the display layer 300.It should be understood that “on” mentioned in this embodiment may beunderstood as being “on a side facing away from the substrate 110”. Thehe encapsulation layer 400 is a thin film encapsulation layer located onthe cathode layers 330 and includes a first inorganic encapsulationlayer, a first organic encapsulation layer and a second inorganicencapsulation layer sequentially arranged in the direction facing awayfrom the substrate 110. Of course, in other embodiments of the presentdisclosure, the encapsulation layer 400 may include any number ofstacked organic and inorganic materials as required, but include atleast one layer of organic material and at least one layer of inorganicmaterial deposited alternately, and the lowermost layer and uppermostlayer are made from inorganic materials.

The display panel 100 further includes a color filter layer 500 locatedon a side of the display layer 300 facing away from the array layer 200.The color filter layer 500 includes a light-blocking layer 510 and colorfilters 520.

FIG. 3 shows a top view of a color filter layer of the display panelaccording to the embodiment of the present disclosure. The region filledwith dot patterns is the region covered by the light-blocking layer 510,and the region encircled by the rounded rectangle is the region coveredby the color filters 520.

The light-blocking layer 510 is a black matrix (BM). The light-blockinglayer 510 may be a grid structure, meshes of the grid are disposed incorrespondence with the light-emitting elements 350, and one meshdefines one color filter 520. The color filters 520 with differentcolors are separated by the light-blocking layer 510. The color filters520 are in one-to-one correspondence with the light-emitting elements350. The color filters 520 include color filters with different colors,and the color filter 520 and the light-emitting element 350corresponding to each other are in the same color.

It should be noted that the correspondence between two elements here maybe understood as orthographic projections of the two elementsoverlapping on the substrate.

The display panel 100 may further include a protective layer 600 locatedon the color filter layer 500. In an embodiment, the protective layer600 is the outermost film of the display panel 100 and may be aprotective cover or a cover film. The protective layer 600 may beadhered to an adjacent film inside the display panel 100 by an opticallyclear adhesive (OCA).

The light-blocking layer 510 includes first light-blocking portions 511(the regions encircled by the dotted circle in FIG. 2 and FIG. 3), andthe first light-blocking portion 511 forms an imaging aperture 502.

The display panel 100 further includes first metal parts 700, and thefirst metal part 700 overlaps at least the first light-blocking portion511 of the light-blocking layer 510.

In other words, the first metal part 700 overlaps at least the edge ofthe light-blocking layer 510 at the imaging aperture 502, does notoverlap the imaging aperture 502, and does not cover the imagingaperture 502. It should be understood that the overlapping describedhere may be a direct contact overlapping.

The display panel 100 further includes an optical sensor layer 800located on a side of the color filter layer 500 facing away from theprotective layer 600 and configured to detect an image formed by theimaging aperture 502.

It should be understood that the case where one film is located on aside of another film includes the case where the two films are incontact and the case where the two films are in non-contact. The case ofnon-contact includes the case where the two films are spaced apart by acertain distance, and the case where other films are spaced apartbetween the two films.

The imaging effect of the imaging aperture 502 can be improved, thequality of imaging pictures can be enhanced, and the accuracy of theoptical recognition can be increased. The imaging aperture 502 is formedthrough the first light-blocking portions 511 of the light-blockinglayer 510 of the color filter layer 500, so that an additionallight-blocking layer for fingerprint recognition imaging does not needto be added, which is advantageous for thinning. Meanwhile, incombination with the design that the first metal part 700 overlaps atleast the region of the light-blocking layer 510 surrounding the imagingaperture 502, the blocking effect of the light-blocking layer 510 isconsolidated to make the edge of the image presented by the imagingaperture 502 clearer and more definite.

The first metal part 700 is located on the lower side of thelight-blocking layer 510, so that the light reflection of the firstmetal part 700 and pattern visibility can be avoided while thedefinition and accuracy of pinhole imaging are increased.

The light-blocking layer 510 further includes a second light-blockingportion 512, and the first light-blocking portion 511 is located betweenthe second light-blocking portion 512 and the imaging aperture 502.

The thickness of the second light-blocking portion 512 is greater thanthe thickness of first light-blocking portion 511. It should beunderstood that the thickness described here is the dimension of thelight-blocking layer 510 in a direction perpendicular to the substrate110 (that is the Z-direction in FIG. 2).

The light-blocking layer 510 is made from an organic material. Thelight-blocking layer 510 made from the organic material is easy topattern, easy to manufacture, has a good film-forming effect, and has awide selection of materials.

Moreover, to have a good light-blocking effect or an effect ofseparating the color filters, the thickness of the light-blocking layer510 is large. The organic material is easier to make a light-blockinglayer with a large thickness and a small stress.

Moreover, to ensure that the imaging aperture 502 penetrates through thelight-blocking layer 510, sufficient patterning is needed. Due todifferent patterning intensities of different depth positions of thelight-blocking layer 510 (for example, taking time as an example,different depth positions have different exposure levels, etch rates andthe like), the side wall of the imaging aperture 502 formed by thelight-blocking layer 510 may be imaged to a slope.

The region covered by the slope is the region where the firstlight-blocking portion 511 is located. The thickness of the region issmaller than the thickness of the second light-blocking portion 512. Thethickness of the first light-blocking portion 511 is thin, so that theblocking performance is poor, and the edge of the image presented by theimaging aperture is blurred or interfered.

That is, only the aperture of the light-blocking layer 510 is used asthe imaging aperture 502. Because the light-blocking layer 510 is madefrom an organic material, has a small edge angle and an OD value of alarge region may be low, a real image formed by the aperture actuallyhas larger “halo”, and the imaging effect is influenced.

The imaging effect of the imaging aperture can be improved, the qualityof the imaging picture can be enhanced, and the accuracy of the opticalrecognition can be increased. The imaging aperture 502 is formed throughthe first light-blocking portions 511 of the light-blocking layer 510 ofthe color filter layer 500, so that an additional light-blocking layerfor fingerprint recognition imaging does not need to be added, which isadvantageous for thinning. Meanwhile, in combination with the designthat the first metal part 700 overlaps at least the region of thelight-blocking layer 510 surrounding the imaging aperture 502, theblocking effect of the light-blocking layer is consolidated to make theedge of the image presented by the imaging aperture 502 clearer and moredefinite. Moreover, the light transmission at the edge of the imagingaperture caused by the thin light-blocking layer and insufficientblocking is improved, and the image quality is enhanced, while theperformance of the light-blocking layer in the color filter layer andthe manufacturing yield of the imaging aperture are ensured.

Referring to FIG. 4 to FIG. 6. FIG. 4 is a top view of another displaypanel according to an embodiment of the present disclosure. FIG. 5 is apartial enlarged view of the display panel of FIG. 4. FIG. 6 is a crosssectional view taken along B-B′ of the display panel of FIG. 5. Thecross sectional view is perpendicular to the plane where the displaypanel is located. The similarities between this structure and the otherabove-mentioned structures will not be described in detail.

Differently, the display panel 100 further includes a touch functionallayer 900 located between the display layer 300 and the light-blockinglayer 510. The first metal parts 700 are in the same layer with at leastone film in the touch functional layer 900.

The touch functional layer 900 is located on a side surface of theencapsulation layer 400 facing away from the display layer 300, and thetouch functional layer 900 may include a stacked touch electrode layerand an insulating layer.

The touch functional layer 900 includes a touch drive electrode and atouch sense electrode to form a mutual-capacitance touch functionallayer. The touch electrode is directly formed by using the encapsulationlayer 400 as a bearing substrate. The touch structure is on-cell.

The touch functional layer 900 includes a first touch electrode layer,an insulating layer and a second touch electrode layer sequentiallystacked, so that the mutual-capacitance touch function may beimplemented. The materials of the first touch electrode layer and thesecond touch electrode layer may be metal such as molybdenum, copper ornano-silver, or indium tin oxide (ITO). The insulating layer may includeat least one organic insulating layer, at least one inorganic insulatinglayer, or a combination of at least one organic insulating layer and atleast one inorganic insulating layer. The organic insulating layer mayinclude a PET insulating layer, and the inorganic insulating layer mayinclude a silicon nitride insulating layer, a silicon oxide insulatinglayer or a zirconium oxide insulating layer. The mutual-capacitancetouch functional layer may be provided with electrodes in differentdirections on the two touch electrode layers, and the electrodes on thetwo touch electrode layers are perpendicular to each other. Because theelectrodes on the two touch electrode layers are framed on differentsurfaces, a capacitor node is formed at an intersection of the two touchelectrode layers. One touch electrode layer may be used as a drivinglayer, and the other touch electrode layer may be used as a sensinglayer. When current flows through one wire in the driving layer, if asignal of capacitance change exists outside, the change of thecapacitance node on the other wire is caused. The change of the detectedcapacitance value may be measured through the sensing layer and anelectronic loop connected to the sensing layer, and touch positioning iscarried out according to the measured sensing signal. A self-capacitancetouch electrode may also be provided in embodiments of the presentdisclosure and will not be described here in detail.

The first metal parts 700 are in the same layer with at least one filmin the touch functional layer 900. That is, the first metal parts 700and films also made from a metal material in the touch functional layer900 are made from the same material and in the same layer.

The touch electrode layer is made from a metal material, and the firstmetal parts 700 and the touch electrode layer are made from the samematerial and in the same layer.

The touch functional layer 900 includes at least one touch electrodelayer 910, and the touch electrode layer 910 includes a touch electrodeformed by a metal mesh. In an embodiment, meshes of the metal meshcorrespond to the light-emitting elements.

The mesh lines of the metal mesh are located in a region covered by thelight-blocking layer 510. Therefore, the interference of light reflectedby the metal mesh on the display can be avoided, and the electrodepattern can be avoided being visible.

In this structure, the edge definition of pinhole imaging is improvedwhile the number of films and the manufacturing process are notincreased. The imaging aperture 502 is formed through the firstlight-blocking portions 511 of the light-blocking layer 510 of the colorfilter layer 500. The film in the first metal parts 700 and the film inthe touch functional layer 900 which are made from the metal materialare made from the same material and in the same layer. An additionallight-blocking layer for fingerprint recognition imaging does not needto be added, and a metal layer does not need to be additionally addedfor providing the first metal parts, which is advantageous forimplementing the thinning of the display panel. Moreover, thecombination of the touch functional layer 900 and the color filter layer500 provided by the present disclosure may also ensure that the firstmetal parts 700 and the touch electrode cannot reflect light, resultingin the damage of the display effect or the pattern visibility.

FIG. 7 is another partial enlarged view of the display panel of FIG. 4.The touch functional layer 900 includes at least one touch electrodelayer 910, and the touch electrode layer 910 includes a touch electrodeformed by a metal mesh. In an embodiment, meshes of the metal meshcorrespond to the light-emitting elements.

At least part of the touch electrode 910 is multiplexed as the firstmetal parts 700. That is, the touch electrode 910 is integrally formedwith the first metal parts 700. Thus, the process can be simplified, thecost can be reduced, the touch electrode 910 can be integrated with thefirst metal parts 700, and the space occupied by the first metal parts700 can be reduced.

FIG. 8 is another partial cross sectional view taken along A-A′ of FIG.1 and the section is perpendicular to the plane where the display panelis located.

Different from the above mentioned examples, the display panel 100includes a first planarization layer 620 between the first metal parts700 and the light-blocking layer 510. In an embodiment, after the touchfunctional layer 900 is fabricated, the first planarization layer 620fabricated by an organic insulating material is covered. The colorfilter layer 500 is then fabricated on the first planarization layer620. The color filter layer 500 may be attached to the firstplanarization layer 620 after fabricated on other platforms. The firstplanarization layer 620 may provide a flat surface for the attachment tofacilitate fabrication.

Moreover, the reliability of the first metal layer being multiplexed asthe touch electrode can also be improved. Because the materials of thelight-blocking layer are conductive, if the first metal layer is part ofthe touch electrode, short circuits may be caused between differenttouch electrodes through the light-blocking layer. The structure canavoid stringent requirements on the materials of the light-blockinglayer, which will be easier to find.

In all above figures, FIG. 2, FIG. 6, FIG. 8-12, the cross sectionalview is perpendicular to the plane where the display panel is located.

The first light-blocking portion 511 is in contact with and covers thefirst metal part 700. That is, the first metal parts 700 are under thelight-blocking layer 510, and the two films are adjacent to each otherand in direct contact with each other. Therefore, the situation thatother films between the first metal part layer and the firstlight-blocking portions 511 need masks can be avoided, a mask can besaved, and the manufacturing process can be simplified. The pattern ofthe first metal part layer and the pattern of the first light-blockingportions are basically consistent, and a space can be provided forleading out signals on the display panel 100. Moreover, the firstlight-blocking portion 511 is in contact with and covers the first metalpart 700, and no gap exists between the light-blocking portion 511 andthe first metal part 700, so that the blocking effect can be improved,and the accuracy of imaging of the imaging aperture can be refined.

In an embodiment, referring to FIG. 9 or FIG. 11, an edge of the firstlight-blocking portion 511 where the imaging aperture 502 is located isterminated at the first metal part 700. That is, the first metal part700 forms a metal edge for the imaging aperture 502.

When the first light-blocking portions 511 of the light-blocking layer510 are formed, the first metal part 700 may form a dam-like structureto intercept and trap the material of the light-blocking layer 510,causing the material of the light-blocking layer 510 around the imagingaperture 502 to be thickened. In addition, the first metal part 700 canalso cushion the first light-blocking portion 511, so that the thicknessof the light-tight structure formed by the light-blocking layer 510around the imaging aperture 502 can be indirectly increased, and theimaging effect of the imaging aperture can be improved.

As shown in any of FIG. 10 to FIG. 12, the color filter 520 covers theimaging aperture 502. In an embodiment, the color filter 520 at leastpartially overlaps the light-blocking layer 510 and overlaps the imagingaperture 502 formed by the first light-blocking portion 511 of thelight-blocking layer 510, causing the color filter 520 fills the imagingaperture 502. It should be noted that to ensure that the lighttransmission of the imaging aperture 502, one imaging aperture 502 iscovered by only one color filter 520.

In this structure, light can be ensured to pass through the imagingaperture 502, and the pattern visibility caused by light reflection ofthe first metal part 700 can be avoided. Even if light reflected by thefirst metal part 700 from the side of the aperture can be blocked by thecolor filter 520.

In FIG. 12, at least two imaging apertures 502 are respectively coveredby color filters 520 with two different colors. Therefore, images imagedby different imaging apertures 502 are formed by lights of differentcolors, and interference among the lights transmitted by differentimaging apertures 502 is avoided.

In an embodiment, the optical sensor layer 800 detects images presentedby imaging apertures 502 covered by color filters 520 with differentcolors at different times.

In an embodiment, the optical sensor layer 800 includes multiple sensorsarranged in an array and in one-to-one correspondence with the imagingapertures 502. In an embodiment, the display panel 100 further includesa control unit (not shown), the control unit controls the light sourceto emit light of different colors at different times, and the controlunit controls a detection unit in correspondence with the imagingaperture 502 filled by the color filter 520 with the color to detect theimage presented by the imaging aperture 502. For example, in the firsttime period, a red light source emits light, and a detection unit incorrespondence with an imaging aperture 502 filled by a red color filtercaptures an image; in the second time period, a green light source emitslight, and a detection unit in correspondence with an imaging aperture502 filled by a green color filter captures an image. The accuracy oflight sensing detection is thus increased.

FIG. 13 is a top view of another display panel according to anotherembodiment of the present disclosure. Every three light-emittingelements adjacent to each other in the display panel are arranged in adelta shape. The imaging aperture 502 is located in a middle of thedelta shape formed by the three light-emitting elements.

The pixels in the display panel 100 are arranged in the delta shape.That is, the light-emitting elements in the display panel 100 arearranged along a first direction X to form pixel rows, and the pixelrows are arranged along a second direction Y to form a pixel array. Red,green and blue pixels are alternately arranged in the first direction X.Adjacent light-emitting elements (pixels) in the second direction Y arearranged in a staggered arrangement. That is, one light-emitting elementis arranged at a position corresponding to the position between twolight-emitting elements in the adjacent row of pixels and is differentin color from the two pixels. Three adjacent pixels form one pixel unit(as indicted by the region encircled by the dotted box). The threepixels of the one pixel unit are arranged in the delta shape, and onepixel of the one pixel unit is equivalent to one corner of the deltashape. One imaging aperture 502 is located in the middle of the deltashape formed by the three light-emitting elements. That is, the imagingaperture 502 is surrounded by the three pixels of the pixel unit.

The aperture provided by the imaging aperture 502 can be enlarged, theblocking effect on the pixel light emission is relatively small, and theopening of the pixel cannot be compressed while the imaging aperture 502is provided.

The area of the red pixel of the pixel unit is smaller than pixels withother colors, that is, the area of red color filter is smaller than thearea of color filters with other colors. It is limited that the mesh ofthe red color filter in the light-blocking layer 510 is the smallest.

The red pixel is located at a position that is not adjacent to the othertwo pixels of the same pixel unit in the first direction X, that is, ata position of the upper “corner” of the delta shape.

Therefore, the space provided with the imaging aperture 502 can befurther increased, and the display effect of the pixels can be improved.

Referring to FIG. 13, the imaging aperture 502 is in the shape of atriangle, and an orientation of a vertex angle of the triangle isopposite to the orientation of the delta shape. That is, the bottom sideof the triangular imaging aperture 502 is parallel to the firstdirection X, and the bottom side is adjacent to the pixel of the upper“corner” of the delta shape. The vertex angle of the triangular imagingaperture 502 opposite to the bottom side points a position between twopixels adjacent in the first direction X in the pixel unit.

The pixel design is matched with the shape and position of the imagingaperture, so that the imaging effect and layout effect of the imagingaperture are improved.

It should be understood that the shape here is the shape presented bythe top view of the display panel, that is, the shape of theorthographic projection of the component on the substrate.

Referring to FIG. 5 or FIG. 7, the first metal part 700 is a closedpattern surrounding the imaging aperture 502. Thus the light leakage indifferent directions can be effectively blocked. In addition, it isadvantageous for the stability of the structure of the imaging aperture502 and forming a structure similar to the edge of the imaging aperture502. In an embodiment, the first metal part 700 is a closed circlesurrounding the imaging aperture 502, which is advantageous for thestress release.

Moreover, for any of the above embodiments, the display panel mayfurther include a fingerprint recognition device, and the fingerprintrecognition device includes the optical sensor layer 800 describedabove.

The display panel 100 in the present disclosure may be an organiclight-emitting display panel. The light-emitting elements may bemultiplexed as the light source of the fingerprint recognition device(the optical sensor layer 800) to ensure that the display panel does notneed to provide a separate light source for the fingerprint recognitiondevice, the display panel has a simple structure and a simple layerrelationship. Thus, the thin and light design of the display panel iseasy to be implemented. Alternatively, the display panel provided by theembodiment of the present disclosure may further include a fingerprintrecognition light source (not shown). The fingerprint recognition lightsource separately provides a light source for the optical sensor layer800 to ensure that the fingerprint recognition device may have multiplefunctions. For example, the fingerprint recognition light source may bean infrared light source, to ensure that the fingerprint recognitiondevice can not only recognize fingerprints, but also recognize bloodflow conditions of human body and monitor human health.

FIG. 14 shows the outline 1000 of a mobile phone. It should beunderstood that the display device 1000 requires a display device 100with a display function, such as a computer, a television or anin-vehicle display device, which is not limited in the presentdisclosure. The display device 1000 has the beneficial effects of thedisplay panel 100 provided by the embodiment of the present disclosure.Reference may be made to the detailed description of the display panel100 in the above embodiments, and these beneficial effects will not berepeated in this embodiment.

What is claimed is:
 1. A display panel, comprising: a substrate having afirst surface and a second surface opposing the first surface; an arraylayer disposed on the first surface of the substrate; a display layerdisposed on a side of the array layer facing away from the substrate,wherein the display layer comprises light-emitting elements; a colorfilter layer disposed on a side of the display layer facing away fromthe array layer, wherein the color filter layer comprises alight-blocking layer and color filters, wherein the color filters are incorrespondence with the light-emitting elements, and wherein thelight-blocking layer comprises first light-blocking portions, eachforming an imaging aperture; a protective layer disposed on the colorfilter layer; first metal parts, wherein each of the first metal partsoverlaps a respective one of the first light-blocking portions of thelight-blocking layer; and an optical sensor layer disposed on a side ofthe color filter layer facing away from the protective layer andconfigured to detect an image formed by the imaging aperture.
 2. Thedisplay panel of claim 1, wherein the light-blocking layer furthercomprises at least one second light-blocking portion, wherein each ofthe first light-blocking portions is located between the at least onesecond light-blocking portion and the imaging aperture; and wherein athickness of the second light-blocking portion is greater than athickness of each of the first light-blocking portions.
 3. The displaypanel of claim 1, further comprising a touch functional layer locatedbetween the display layer and the light-blocking layer; wherein thefirst metal parts are disposed in a same layer as the touch functionallayer.
 4. The display panel of claim 3, wherein the touch functionallayer comprises at least one touch electrode layer; in a case where thetouch functional layer comprises one touch electrode layer, the onetouch electrode layer comprises a touch electrode formed by a metalmesh, and at least part of the one touch electrode is multiplexed as thefirst metal parts; and in a case where the touch functional layercomprises touch electrode layers, each of at least one of the touchelectrode layers comprises a touch electrode formed by a metal mesh, andat least part of each of the at least one of the touch electrodes ismultiplexed as the first metal parts.
 5. The display panel of claim 4,wherein mesh lines of the metal mesh are disposed in a region covered bythe light-blocking layer.
 6. The display panel of claim 1, furthercomprising a first planarization layer disposed between the first metalparts and the light-blocking layer.
 7. The display panel of claim 1,wherein one of the first light-blocking portions is in contact with andoverlaps an associated one of the first metal parts.
 8. The displaypanel of claim 7, wherein an edge of one of the first light-blockingportions where the imaging aperture is located is terminated at theassociated one of the first metal parts.
 9. The display panel of claim1, wherein at least one of the color filters overlaps the imagingaperture.
 10. The display panel of claim 9, wherein two differentimaging apertures overlap with two of the color filters having twodifferent colors.
 11. The display panel of claim 10, wherein the opticalsensor layer detects images from imaging apertures overlapped by thecolor filters with different colors at different times.
 12. The displaypanel of claim 1, wherein every three light-emitting elements adjacentto each other among the light-emitting elements are arranged in atriangular shape, and one imaging aperture is located in a middle of thetriangular shape formed by said three light-emitting elements.
 13. Thedisplay panel of claim 12, wherein said imaging aperture is in a shapeof a triangle, wherein an orientation of a vertex angle of the triangleis opposite to an orientation of the triangular shape.
 14. The displaypanel of claim 1, wherein each of at least one of the first metal partsis a closed pattern surrounding a respective one imaging aperture.
 15. Adisplay device, comprising: the display panel of claim
 1. 16. A displaydevice, comprising: the display panel of claim
 2. 17. A display device,comprising: the display panel of claim
 3. 18. A display device,comprising: the display panel of claim
 4. 19. A display device,comprising: the display panel of claim
 5. 20. A display device,comprising: the display panel of claim 6.